At One School, the Average Amount of Time That Tenth-Graders $\begin{array}{l}\mathrm{H}_{0}: \mu=21.6 \text { hours } \\\mathrm{H}_{\mathrm{a}}: \mu<21.6 \text { hours }\end{array}$

question 1

Multiple Choice

At one school, the average amount of time that tenth-graders spend watching television each week is 21.6 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average
Amount of time spent watching television per week has decreased. The hypotheses are:
$\begin{array}{l}\mathrm{H}_{0}: \mu=21.6 \text { hours } \\\mathrm{H}_{\mathrm{a}}: \mu<21.6 \text { hours }\end{array}$
Explain the meaning of a correct decision.

• A) Failing to reject the hypothesis that \( \mu=21.6 \) hours when in fact \( \mu=21.6 \) hours OR concluding that \( \mu<21.6 \) hours when in fact \( \mu<21.6 \) hours
• B) Concluding that \( \mu>21.6 \) hours when in fact \( \mu<21.6 \) hours
• C) Failing to reject the hypothesis that \( \mu=21.6 \) hours when in fact \( \mu<21.6 \) hours
• D) Concluding that \( \mu<21.6 \) hours when in fact \( \mu=21.6 \) hours

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Definitions:

Animals

Refers to multicellular, eukaryotic organisms in the kingdom Animalia that typically have the ability to move and consume organic material.

Marginal Analysis

An examination of the additional benefits of an activity compared to the additional costs incurred by that same activity.

Insignificant Benefits

Benefits or advantages that are too small or unimportant to make a noticeable difference.

Opportunity Costs

The advantages or gains a person, investor, or company forgoes by selecting one option instead of another.